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Video: Science for Sale

In part one of a two-part series, PBS NewsHour Science Correspondent Miles O'Brien travels to Hinkley, Calif. -- the town whose multi-million dollar settlement for groundwater contamination was featured in the movie "Erin Brockovich." Now, almost 30 years later, O'Brien explores the reasons why the groundwater in Hinkley still has dangerous levels of the chemical chromium and its link to cancer.